On Wed, Jun 22, 2016 at 7:06 AM, Eduardo Valentin <edubezval@xxxxxxxxx> wrote: > Because several drivers do the following pattern: > .set_mode() > ... > local_data->mode = new_mode; > thermal_zone_device_update(tz); > > makes sense to simply do the thermal_zone_device_update() > in thermal core, after setting the new mode. > > Also, this patch also remove deadlocks on drivers that > call thermal_zone_device_update() on .set_mode(), > as .set_mode() is now called always with tz->lock held. To me, this part of the patch is way more important than the optimization mentioned before. Apparently, the problem is that drivers deadlock, because the thermal_zone_device_update() invoked from ->set_mode() is called under tz->lock. So to address that problem you make the core call thermal_zone_device_update() after ->set_mode() outside of tz->lock and the drivers don't have to do it any more. Is that correct? Thanks, Rafael -- To unsubscribe from this list: send the line "unsubscribe linux-acpi" in the body of a message to majordomo@xxxxxxxxxxxxxxx More majordomo info at http://vger.kernel.org/majordomo-info.html
